off-the-cuff
🇺🇸
/ˌɔːf ðə ˈkʌf/
🇬🇧
/ˌɒf ðə ˈkʌf/
Spontaneous and unrehearsed.
She gave an off-the-cuff speech that was both engaging and insightful.
她即兴发表了一场既吸引人又富有洞察力的演讲。